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Sempra to Use Moon-Mission Technology to Back Up Substations

Sempra Energy’s San Diego utility unit is turning to a technology used during the Apollo moon missions to provide backup power for its systems: hydrogen fuel cells. The systems provide a way to make the utility’s systems more reliable during a power failure. The deal comes less than a month after the U.S. Energy Department warned that the nation’s grid is vulnerable to cyber-attacks, which are becoming more frequent and more sophisticated.